Emerson ib-106-340cdr Also, do not get any cement onto the flame arrestor element

Instruction Manual

IB-106-340CDR Original Issue January, 2002

Hazardous Area Oxymitter DR

M5-0.8 x 5 mm

LOCKING SET SCREW (USE 2.5 mm HEX KEY)

THREADED	SPANNER
PROBE FLANGE	WRENCH

CERAMIC

DIFFUSION

ELEMENT

Do not get cement on ceramic diffu- sion element except where it touches the hub. Any cement on ceramic diffu- sion element blocks airflow through element. Wiping wet cement off of ce- ramic only forces cement into pores.

FLAME ARRESTER HUB

M6-1 x 6 mm

SETSCREW (USE 3 mm

HEX KEY)

Also, do not get any cement onto the flame arrestor element.

9. Thoroughly mix cement and insert tip

of squeeze bottle into cement port. Tilt

CEMENT

PORTCEMENT

FILLET

VEE

DEFLECTOR

27540008

Figure 4-5. Ceramic Diffusion Element

Replacement

3.On systems equipped with abrasive shield, remove dual dust seal gaskets.

4.Use spanner wrenches from Probe Disassembly Kit, Table 7-1,to turn hub free from retainer.

5.Put hub in vise. Break out old ceramic diffusion element with chisel along ce- ment line. Use a 9.5 mm (3/8 in.) pin punch and clean fillet from the cement port.

6.Break out remaining ceramic diffusion element by tapping lightly around hub with hammer. Clean grooves with pointed tool if necessary.

7.Replace ceramic diffusion element us- ing the ceramic diffusion element re- placement kit in Table 7-1.This consists of a diffusion element, ce- ment, setscrews, anti-seize compound, and instructions.

8.Test fit replacement ceramic diffusion element to be sure seat is clean.

bottle and squeeze while simultane-

ously turning ceramic diffusion element

into seat. Do not get any cement on

upper part of ceramic diffusion ele-

ment. Ensure complete penetration of

cement around 3 grooves in hub. Ce-

ment should extrude from opposite

hole. Wipe excess material back into

holes and wipe top fillet of cement to

form a uniform fillet. (A cotton swab is

useful for this.) Clean any excess ce-

ment from hub with water.

10. Allow filter to dry at room temperature

overnight or 1 to 2 hours at 93°C

(200°F).

11. Wipe a heavy layer of anti-seize com-

pound onto the threads and mating

surfaces of the flame arrestor, diffusion

hub, and probe tube.

12. Assemble flame arrestor and diffusion

hub with two pin spanner wrenches.

Torque to 14 N·m (10 ft-lbs). Secure

with hub retaining setscrew.

13. On systems equipped with abrasive

shield, install dust seal gaskets with

joints 180° apart.

14. Reinstall vee deflector, orienting apex

toward gas flow. Apply anti-seize com-

pound to setscrews and tighten with

hex wrench.

15. Reinstall probe on stack flange.

4-8 Maintenance and Service Rosemount Analytical Inc. A Division of Emerson Process Management